Problem Analysis 1 What is Problem Analysis o

Problem Analysis 1

What is Problem Analysis? o The process of understanding real-world problems and user needs and proposing solutions to meet those needs o A problem can be defined as the difference between things perceived and things desired 2

Steps in Problem Analysis o Gain agreement on the problem definition o Understand the root causes – the problem behind the problem o Identify the stakeholders and users o Define the solution system boundary o Identify the constraints to be imposed on the solution 3

Gain Agreement on the Problem Definition o Team techniques for understanding the problem that a new software system is intended to solve o One approach is to write it down and see if everyone agrees 4

Problem Statement Format Element Description The problem of. . . Describe the problem Affects. . . Identify stakeholders affected by the problem And results in. . . Describe the impact of this problem on the stakeholders Benefits of a solution. . . Indicate the proposed solution and list a few key benefits 5

Understand the Root Causes – The Problem behind the Problem o The process by which the team gains an understanding of the causes of the problem under consideration o Techniques include fishbone diagrams and pareto charts 6

Identify the Stakeholders and Users o A stakeholder is anyone who could be materially affected by the implementation of a new system or application o Identifying them involves interviewing decision makers, potential users, and other interested parties 7

Helpful Questions to Ask in Identifying Stakeholders n n n n Who are the users of the system? Who is the customer (economic buyer) for the system? Who else will be affected by the outputs the system produces? Who will evaluate and approve the system when it is delivered and deployed? Are there any other internal or external users of the system whose needs must be addressed? Who will maintain the new system? Is there anyone else who cares? 8

Define the Solution System Boundary o Determine the boundaries of the solution system o Divide the world in two: n n Our system Things that interact with our system o Someone or something outside the system that interacts with the system is an “actor” 9

Identifying Actors o Who will supply, use, or remove information o o o from the system? Who will operate the system? Who will perform any system maintenance? Where will the system be used? Where does the system get its information? What other external systems will interact with the system? 10

Identify the Constraints to be Imposed on the Solution o A constraint is a restriction on the degree of freedom we have in providing a solution o Some constraints become requirements for the system o Others affect resources, implementation plans, and project plans 11

Potential Sources of System Constraints Source Sample Considerations Economic What financial or budgetary constraints apply? Are there costs of goods sold or any product pricing considerations? Are there any licensing issues? Politics Do internal or external political issues affect potential solutions? Are there any interdepartmental problems or issues? Technology Are we restricted in our choice of technologies? Are we constrained to work within existing platforms or technologies? Are we prohibited from using any new technologies? Are we expected to use any purchased software packages? Systems Is the solution to be built on our existing systems? Must we maintain compatibility with existing solutions? What operating systems and environments must be supported? Environment Are there environmental or regulatory constraints? Are there legal constraints? What are the security requirements? What other standards might restrict us? Schedule and resources Is the schedule defined? Are we restricted to existing resources? Can we use outside labor? Can we expand resources? Temporarily? Permanently? 12